release: 3.19.0

[stainless-app]

Automated Release PR

3.19.0 (2026-03-27)

Full Changelog: v3.18.0...v3.19.0

Features

• internal: implement indices array format for query and form serialization (b2cccf5)

---

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[stainless-app]

🧪 Testing

To try out this version of the SDK:

pip install 'https://pkg.stainless.com/s/stagehand-python/3b89906f09aee88a003b2aa3d485a93576943c92/stagehand-3.18.0-py3-none-any.whl'

Expires at: Sun, 26 Apr 2026 15:03:08 GMT
Updated at: Fri, 27 Mar 2026 15:03:08 GMT

[cubic-dev-ai]

No issues found across 5 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

Architecture diagram

sequenceDiagram
    participant U as User/Consumer
    participant SDK as Stagehand SDK
    participant QS as QueryString Serializer (_qs.py)
    participant API as Remote API

    Note over U,API: Request Serialization with array_format="indices"

    U->>SDK: Method call with list parameter (e.g., tags=['a', 'b'])
    SDK->>QS: _stringify_item(key="tags", value=["a", "b"], opts)
    
    alt array_format == "indices"
        loop NEW: For each index i in value
            QS->>QS: Recursively stringify key as "tags[i]"
        end
        QS-->>SDK: Returns "tags[0]=a&tags[1]=b"
    else CHANGED: Previously
        Note over QS: Raised NotImplementedError
    end

    SDK->>API: HTTP Request with serialized query/form data
    API-->>SDK: Response
    SDK-->>U: Return parsed data

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[stainless-app]

🤖 Release is at https://github.com/browserbase/stagehand-python/releases/tag/v3.19.0 🌻